By Ben Amina, Owner and Manager
Aire One East Heating & Cooling, Whitby, Ontario
Technical review: [INSERT REVIEWER NAME + REAL ROLE OR TSSA LICENCE CLASS, Aire One East]

A heat pump in Ontario is a genuinely good piece of equipment attached to a genuinely complicated financial question. It heats and cools with one system, it works in a Durham Region winter, and the technology is not in doubt.

What is in doubt, for a lot of Whitby and Oshawa homeowners, is whether it will actually save you money when natural gas here is cheap. This guide gives you the real numbers rather than the sales pitch. You can also read the equipment overview on the Aire One network heat pump page, and when you are ready to talk specifics, our heat pump installation and repair service in Whitby is the place to start.

How a Heat Pump Actually Works

A furnace makes heat by burning gas. A heat pump does not make heat at all, it moves it. Using the same refrigeration cycle as your air conditioner, it extracts heat energy from outdoor air, even air that feels cold to you, and delivers it inside. In summer it runs the cycle in the other direction and works exactly like a high efficiency air conditioner.

That distinction is why efficiency figures look strange. A high efficiency gas furnace tops out near 98 percent, because you cannot get more heat out than the fuel contains. A heat pump routinely delivers two to three units of heat per unit of electricity it consumes, because it is transporting energy rather than creating it. The measure is coefficient of performance, or COP. Where the honest caveat sits is that COP is not constant. A cold climate unit that performs around 3.0 at 8 degrees Celsius may drop closer to 1.5 to 2.0 at -20 degrees, which is exactly when you need the most heat. Any efficiency claim that quotes one figure without naming the outdoor temperature is not telling you the whole story.

What a Heat Pump Costs in Ontario

Pricing depends far more on your house than on the box outside it. Existing ductwork, electrical panel capacity, home size, and whether you are keeping a gas furnace as backup move the number more than the brand does.

Costs shown are typical Ontario ranges in Canadian dollars (CAD), verified July 2026, subject to change. Exact pricing requires an in home assessment.

The panel upgrade line is the one that catches people out. An all electric conversion in an older Oshawa or Ajax home on 100 amp service can need a service upgrade before anything else happens, and that cost belongs in the comparison from the start rather than as a surprise partway through the quote.

Will It Cut Your Bill? The Ontario Gas Problem

This is where we part company with most of the marketing, including some written by our own industry. In provinces with expensive electricity or homes running on oil, propane, or electric baseboard, a heat pump cuts heating costs dramatically and the case is easy. Ontario is a different market, because natural gas here is inexpensive and electricity is not.

The practical outcome for a Durham Region home heated by a modern high efficiency gas furnace is that a heat pump may reduce your heating bill modestly, leave it roughly flat, or in some rate and usage combinations increase it slightly, depending on your electricity plan, how cold the winter runs, and where the changeover to gas is set on a dual fuel system. What it reliably does is replace your air conditioner, cut emissions, and give you one system to maintain instead of two.

So the honest framing is this. If your furnace and air conditioner are both near end of life and you were going to spend money anyway, a heat pump or dual fuel system is a strong buy, because you are comparing it against the cost of replacing two units rather than against zero. If your furnace is eight years old and running well, the payback maths on ripping it out is usually poor, and we will tell you that. Compare against your real alternative, which for many homes is our furnace installation options rather than nothing at all.

Cold Climate Performance in a Durham Winter

The old objection that heat pumps stop working in Canadian cold is out of date, but the replacement claim that they work perfectly at any temperature is oversold. Modern cold climate models hold rated heating capacity down to around -25 degrees Celsius and keep running at reduced output below that, using enhanced vapour injection compressors and larger heat exchangers. That capability is roughly $1,500 to $3,000 CAD of the equipment cost compared with a standard model, and in Durham Region it is not optional.

Durham sits close enough to Lake Ontario to be milder than inland Ontario, but a Whitby design temperature still means planning for the deep cold snaps, not the average. Two things matter more than the brochure rating: the unit has to be sized to your actual heat loss rather than to your old furnace's output, and if it is a dual fuel setup, the changeover point has to be commissioned properly so the gas furnace takes over at the temperature where it is genuinely cheaper to run.

All Electric, Dual Fuel, or Ductless

Costs and configurations reflect typical Ontario installations, verified July 2026, subject to change. Exact recommendations require an in home assessment.

For most gas heated Durham homes, dual fuel is the pragmatic answer. It is also the honest answer to the claim that a heat pump eliminates fossil fuel use in your home, because a dual fuel system does not. It reduces gas consumption substantially across the shoulder seasons and most of the winter, and that is a real and worthwhile result stated accurately.

Rebates in 2026, What Is Actually Open

Be careful here, because a large number of Ontario contractor pages are still advertising rebate programs that closed. As of July 2026, the picture is this.

• Canada Greener Homes Grant: closed. It stopped taking new applicants on 29 February 2024. Any page still promising you $5,000 from it is out of date.
• Canada Greener Homes Loan: closed to new applicants as of 1 October 2025.
• Enbridge Home Efficiency Rebate Plus: closed. Final documentation deadlines passed at the end of 2025.
• Home Renovation Savings Program: open. Delivered by Enbridge Gas and Save on Energy with support from the Government of Ontario. Published amounts reach up to $7,500 CAD for a qualifying cold climate air source heat pump, calculated per ton of capacity, with a higher per ton rate for homes heated by electricity, oil, propane, or wood than for gas heated homes. Installation must be by a participating contractor, and on some paths the pre retrofit assessment must happen before any work begins.
• Oil to Heat Pump Affordability program: closing. Natural Resources Canada lists 31 July 2026 as the last day to apply. It is aimed at homeowners currently heating with oil, and in Ontario it is delivered through the Save on Energy Energy Affordability Program with income based eligibility rather than as a simple contractor rebate.

The single most expensive mistake we see is starting work before the required assessment on a rebate path that demands one. Confirm the sequence before anyone touches your equipment. We will help with the paperwork, but no contractor, including us, can approve your eligibility.

Is a Heat Pump Right for Your Home?

• Strong yes if you heat with oil, propane, or electric baseboard. The running cost improvement is large and the rebate support is best.
• Strong yes if your furnace and air conditioner are both near end of life. You are replacing two things anyway, so the incremental cost of going dual fuel is modest.
• Yes if you have no ductwork and want both heating and cooling. Ductless is often cheaper than adding ducts and an AC.
• Probably not yet if your gas furnace is under about ten years old and working well. Keep it, and revisit when the air conditioner fails.
• Check first if you are on 100 amp electrical service and considering all electric. Price the panel upgrade before you compare quotes.
• Not a fit if your priority is the lowest possible winter bill on natural gas and nothing else. A high efficiency furnace still wins that narrow contest in Ontario.

How We Size and Quote a System

1. Heat loss and heat gain calculation for your actual home, not a rule of thumb based on square footage or on the size of the old furnace.
2. Duct and electrical assessment. Existing duct capacity, static pressure, panel size, and breaker space, because these determine what is even possible.
3. Fuel and rate comparison using your current bills, so the running cost estimate is yours rather than a provincial average.
4. Configuration recommendation across all electric, dual fuel, and ductless, with the changeover strategy stated for dual fuel.
5. Rebate path check before any work is scheduled, including which assessment has to happen first.
6. Written quote covering equipment, installation, permits, disposal, and any panel work, with financing options if you want them.

[INSERT AIRE ONE EAST DATA: e.g. the share of Durham Region heat pump quotes where we recommended dual fuel over all electric, or the average measured heat loss versus old furnace output on homes we assessed, with the number of homes (N), the date window, and the technician or team who compiled it. Publish only with a real sample of at least 30 and show the N beside any percentage. Delete this block entirely if no verified figure is available.]

Frequently Asked Questions

Do heat pumps work in Ontario winters?

Yes. Cold climate models hold their rated heating capacity down to roughly -25 degrees Celsius and continue operating at reduced output below that. Capacity and efficiency both fall as it gets colder, which is why Durham Region installations are either sized for the deep cold or paired with a gas furnace as backup in a dual fuel setup.

How much does a heat pump cost in Ontario?

A central ducted cold climate heat pump typically runs $8,000 to $14,000 CAD installed, and a dual fuel system replacing both a furnace and air conditioner usually lands around $9,000 to $13,000 CAD. Ductless single zone systems start near $3,500 CAD. An electrical panel upgrade, if your home needs one, adds $1,500 to $4,000 CAD.

Is the Canada Greener Homes Grant still available for heat pumps?

No. It closed to new applicants on 29 February 2024, and the Canada Greener Homes Loan closed to new applicants on 1 October 2025. The live provincial program in 2026 is Home Renovation Savings, delivered by Enbridge Gas and Save on Energy, with published amounts up to $7,500 CAD for a qualifying cold climate air source heat pump.

Will a heat pump lower my energy bill in Ontario?

Not always, and this is where Ontario differs from other provinces. Against oil, propane, or electric baseboard heating the savings are large. Against a modern high efficiency natural gas furnace, the running cost can be similar or only modestly better, because Ontario gas is inexpensive relative to electricity. The reliable wins are replacing your air conditioner and cutting emissions.

What is a dual fuel heat pump system?

It pairs a heat pump with a gas furnace and switches between them at a set outdoor temperature called the changeover point. The heat pump handles the shoulder seasons and moderate cold where it is cheaper, and the furnace takes over in deep cold where it is cheaper and has full capacity. For most gas heated Durham homes it is the lowest running cost configuration.

How long does a heat pump last?

Typically 15 to 20 years with annual maintenance, which is comparable to a furnace and longer than many air conditioners. Because a heat pump runs year round rather than seasonally, maintenance matters more than it does on a system that sits idle half the year. An annual service visit is the single biggest factor in reaching the upper end of that range.

The Bottom Line for Durham Homeowners

A heat pump is the right call when you are already replacing equipment, when you heat with oil, propane, or electric, or when you want heating and cooling from one system. It is the wrong call when it means scrapping a healthy high efficiency gas furnace to chase savings that Ontario gas prices will not deliver. Dual fuel is the configuration that fits most Durham homes, the Home Renovation Savings Program is the rebate that is actually open, and the oil to heat pump deadline is close. For the numbers on your specific home, call Aire One East at 905-576-7600 or book a free in home assessment.

References

1. Natural Resources Canada, Oil to Heat Pump Affordability program
2. Natural Resources Canada, Greener Homes Grant Ontario (closed)
3. Enbridge Gas, Home Efficiency Rebate Plus (closed to new applicants)
4. ENERGY STAR Canada, Natural Resources Canada

Costs reflect typical Ontario ranges, verified July 2026, subject to change. Rebate programs change without notice and eligibility is determined by the program administrator, not by Aire One East. Confirm current amounts and deadlines before starting a project.